Silicon carbide powder

When sourcing Silicon Carbide powder, you must prioritize purity levels (typically 98% to 99.9%), particle size distribution (PSD), and crystal structure (Alpha vs. Beta). For abrasive applications, Mohs hardness (9.5) and grit size (FEPA or JIS standards) are critical. For semiconductor or ceramic applications, focus on low trace metal impurities and consistent thermal conductivity.

Black Silicon Carbide contains approximately 98% SiC and is tougher than green SiC; it is ideal for grinding non-ferrous metals, stone, and glass. Green Silicon Carbide has a higher purity (99%+) and is more friable, making it the preferred choice for precision grinding of hard alloys, ceramics, and silicon wafers in the electronics industry.

Ensure the supplier adheres to ISO 9001 for quality management. For abrasive grains, check for compliance with FEPA (Federation of European Producers of Abrasives) or ANSI standards. If the powder is used in electronics, request a RoHS (Restriction of Hazardous Substances) compliance certificate and a detailed Certificate of Analysis (COA) for every batch.

Silicon Carbide is highly versatile. It is used in refractories for high-temperature kilns, abrasives for sandblasting and polishing, technical ceramics for armor plates, and power electronics as a wide-bandgap semiconductor material. Its high thermal shock resistance also makes it suitable for automotive brake components.

Always request a pre-shipment inspection (PSI) by a third party like SGS or Intertek. Require the supplier to provide a Material Safety Data Sheet (MSDS) and a COA that matches the specific batch number. For high-value orders, use Made-in-China.com's secured payment services to ensure funds are only released upon quality verification.

Silicon Carbide is heavy and can be abrasive to packaging. Ensure the use of moisture-proof double-layered Big Bags (1MT) or 25kg reinforced paper bags on fumigated pallets. Since it is a fine powder, specify vacuum sealing or shrink-wrapping to prevent leakage and contamination during sea freight.

Prices are often tied to the cost of raw petroleum coke and quartz sand, as well as electricity rates. Negotiate based on volume tiers (e.g., 20-ton FCL) and ask for FOB (Free On Board) pricing to maintain control over your shipping costs. Mentioning long-term demand can often secure a 5-10% discount compared to spot-market prices.

Verify the supplier's Business License and Export License through the Made-in-China.com audit reports. Avoid direct wire transfers to private accounts; always use corporate bank accounts verified by the platform. Ensure the Incoterms 2020 are clearly defined in the Sales Contract to avoid disputes over insurance and freight responsibilities.